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Most Robust Cast Iron Atmospheric Boilers
If one decides to forego a mod con and opt for a gas CI with Outdoor Reset for a small 40K btu house, which of today's brands/models do you recommend? We've heard that these days even CI units are not made the same as before, with thinner heat exchangers, etc. I would be looking for the ones with the thickest heat exchangers, best parts longevity and long-term availability, ease of maintenance, best warranty, etc. My mother has a 2006 Buderus oil G115-3 that, once they added the tiger loop and got the right nozzle has worked trouble-free for 12 years and looks like it could go for another 20. Not sure I'd use an ECM circ here due to hard water issues and some old 1-inch steel gravity riser pipes mixed with the 3/4" copper run.